Loom for fancy-leno weaving.



PATENTBD JUNE 6, 1905.

' No. 791,579." y F. lF. RQGHB.-

v LOOM PoR FANCY LBNo WBAVING.:

APPLICATION FILED I'EB. 5, 1903.

v 2 SHEETS-suns ....wswsnu@ Rl Nek S3 NO3 PATENTED JUNE 6, 1905.

F. P. ROCHE. LOOM FOR FANCY LENO WEAVING.

APPLICATION F ILED FEB'. 5,- 1903.

INI/ENTOR f UNITED STATES` Patented June Q6, 19052 PATENT OFFICE.

FREDERICK E. ROCHE, OE LINCOLN, RHODE IsLAND,` AssIGNOR To MAN- VILLECOMPANY, OE PROVIDENCE, RHODE ISLAND, A CORPORATION OF NEW JERSEY.

LOOM FOR FANoY-LENO wEAvlNe...

SPECIFICATION forming part of Letters. Patent No. 791,57 9, dated June6, 1905.

Application Eea Petrus-y 5, 190s. semi No. 142,033.

To @ZZ whom t may concern:

Be it known that I, FREDERICK F. ROCHE, lof Lincoln, in the county ofProvidence and State of Rhode Island,` have invented certain new andusefullrnprovements in Looms for Fancy- Leno Weaving; and I do herebydeclare the following speoicat'ion, taken lin connection with theaccompanying drawings, forming a part of the same, to be a full, clear,and exact description thereof. The present invention relates moreparticularl y to looms for weaving fancy leno or'gauze fabrics. in whichthe body of the fabric is `composed of leno-weaving and in which thereare patterns or designs formed vby the introduction of a second oradditional weft-thread; and the invention has for its object to providesimple and eiioient mechanism'for producing fabrics of this character. i

To that end vthe invention consists in the combination with the otherparts of a Jacquard or fancy loom of a combined combfand reed withmechanism controlled by a suitablepattern device for giving to suchcombi-ned comb and reed both vertical and lateral movements, 'wherebyboth the opening of the shed and the crossing1 of the threads for theleno-weave will be effected by said combined comb and Y reed and wherebythe location or arrangeg different stages of the weaving.

A represents the frame of an ordinary J acquard or fancy loom, in whichis mounted the main shaft B, provided with fast and loose pulleys a a.The shaft B is provided with the usual cranks Z) b for operating the layC through the connecting-links c. D is the combined comb and reed, whichi provided with alternate long dents UZ and 'short per or free ends witheyes cl2, through which l one set of the warp-threads are passed.

The combined comb and reed is connected with the jacquard mechanism sothat both vertical and lateral movements will be given to said combinedcomb and reed through said jacquard mechanism, the times when suchmovements shall be given to the combined comb and reed being controlledby a suitable pattern.

Connected with the upper side of the frame of the combined comb and reedare two straps e e, said straps being connected to two of the uprightsof the jacquard mechanism, by means of which the required upwardmovements are givenl to the combined comb and reed at the desired times,according to the pattern employed. Connected with the lower side of theframe of the combined comb and reed are two springs ff, the other endsof which are secured to the floor or other fixture. The springs f fserve to give the required downward movements to the combined comb andreed at the desired times and when permitted to do so -by the jacquardmechan- To give the required lateral movements to the combined comb andreed in one direction, a cord g is connected to'one end ofthe frame,said Cord passing around suitable pulleys g' g' and being connected toone arm of a bellcrank lever z.. pivoted on a standard 7a2, secured tothe frame of the loom. The other arm, 71.', of the bell-crank lever isconnected by a strap c' with one of the uprights of the jacquardmechanism. To give the required lateral movement to the combined comband reed in the other direction, a spring j is connected to the otherendy of the frame of the combined comb and-reed and to the frame of theloom, the action of saidspri'ngV being controlledV by the patternmechanism.

1n Fig. 1 the combined comb and reed is is held in this lateralpositionagainst the pull ot the spring j by the latch Z. yAs will be seen, thecombined comb and reed when depressed is moved to a position to bringthe upper ends of the shortdents d below the lower threads t of the shedand so that in moving laterally the short dents may pass by saidthreads. This gives the appearance in Fig. 4 of there being three setsof warp-threads, which is not the case, the warp-threads t beingseparated by the jacquard-harnesses to Jform the shed, andthe vthreadst, which form a portion of the lower side of the shed, being carried bythe short dents to a plane below the lower threads z5. Y

The pattern weft-thread having been carried through the shed opened bythe jacq uard-harnesses the combined comb and reed' is then raised tolift the threads t and open the shed for the next pick, thejacquard-harnesses being atthe same time operated to bring all thethreads into the same plane and the parts being brought into theposition shown in Fig. 5. rIhe short dents cl rise this time on theother side ofthe warp-threads t', thereby7 completing the crossing ofthe threads tand t', which crossing takes place at or near the wovenfabric and serves to hold the leno weft-thread and the patternweft-thread in place. The thread z5 now lies on the Jfront side ot' theshort dent d', as shown in said Fig. 5. It will be observed that whenthe short dent comes up on this side of the thread t there is nocrossing of the threads adjacent to the eye p of the jacquard-harness,the reason for this be-.

ing that the threads t and-t have now been brought back to their normalrelation as delivered from the warp-roll.

When the leno weft-thread has been carried through the lshed thusformed, the combined comb and reed is again depressed and movedlaterally to the left, the latch Z being released at the proper time topermit such lateral movement, and the shed for the next pick is openedby the jacquard harnesses and the pattern weft-thread laid. The combinedcomb and reed is then again raised to open the shed for the next pick,and-so on.

By reason of the temporary crossing of the threads near the eye of thejacquard-harness, which takes place when the short dent comes up on thefar side of the thread t', as shown in Fig. 3, the shed formed by thecombined comb and reed at this pick is much shorter than the shed formedby the jacquardharness and much shorter than the shed formed by thecombined comb and reed when the short dent comes up on the front side ofthe thread t', as shown in the drawings. Because of the shortness of theshed at this pick it is desirable that the threads t should be eased up,so as to give an amount of slack sufficient to permit the requisiteupward movement ot' the combined comb and reed to form the shed. It isfor this reason that the caser-roll s is employed and the threads t ledover such easerroll, saideaser-roll being moved forward at the propertimes by the jacquard mechanism in the usual manner and so as to give upthe necessary amount of slack. It desired, the caser-roll may beoperated for every pick at Awhich the `shed is opened by the combinedcomb and reed; but this is not necessary, because with the threads inthe position shown in Fig. 5 the shed opened by the combined comb andreed extends back nearly to the Jforward lease-rod and is nearly as longas the shed formed by the jacquard-harness.

With the construction and operation of parts above described it will beseen that the combined comb and reed not only serves to elfect thecrossing of the threads, but also serves to open the shed for the pickat which the leno weft-thread is laid` said'combined comb and reed beinggiven both lateral and vertical movements to perform these functions. Itwill be further seen that the movements of the combined comb and reed,both vertical and lateral, are effected or controlled by patternmechanism, and that thus the times oi" these movements may be varied asdesired. Thus the shed maybe opened by the combined comb and reed and bythe jacquard-harnesses alternately and the leno weft-thread and thepattern weft-thread laid at alternate picks, or the shed may be openedand closed successively by the combined comb and reed and a successionof leno weft-threads laid to produce plainleno Weaving and Without thelaying of any pattern weft-threads, or the combined comb and reed may beheld out of operation while the shed is opened a number of times by thejacquard-harnesses and a number of pattern weft-threads laid insuccession before the shed isfagain opened by the combined comb and reedfor the laying of the next leno weftthread. In the latter case by theopening of different sheds for the successive pattern weftthreads thecharacter and arrangement of the patterns may be varied. If desired, thesuccessive pattern weft-threads may be of different or varying colors.

What I claim as my invention, and desire to secure by Letters Patent, is

l. In a loom, the combination, with pattern mechanism, of a combinedcomb and reed cornprising long dents and short dents, the short dentsbeing provided with eyes to receive one set of the warp-threads, saidcombined comb and reed being given both a vertical and a lateralmovement under the control of said pattern mechanism, substantially asdescribed.

2. In a loom, the combination, with pattern mechanism, of acombined comband reed comprising long dents and short dents, the short dents beingprovided with eyes to receive one set of the warp-threads, said combinedcomb and reed being given la lateral movement to `cross thewarp-threads, and then an upward movement to o pen the shed-for the nextpick,

IOO

IIO

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said movements of the combined comb and reed being controlled by thepattern mechanism, substantially as described.

3. In a loom, the con'ibination of harnesses for operating one set ofwarp-th reads, a combined comb and reed for operatingl the other set ofwarp-threads, pattern mechanism for controlling` said harnesses to openthe shed for certain picks and for controlling said combined comb andreed to cross the threads and to open the shed AFor certain other picks,substantially as described.

Lt. In a loom, the combination ot' harnesses for operating one set ot'warpthreads, acombined comb and reed for operating the other set ofwarp-threads, an easer-roll over which said second set of warp-threadsare passed, pattern mechanism for controlling said harnesses to open theshed for certain picks and for controlling` said combined comb and reedto cross the threads and to open the shed `for certain other picks, andalso for controlling the operation of said caser-roll at the propertimes. substantially as described.

In a loom, the combination, with pattern mechanism, oi'` a combinedeomband reed comprising long dents and short dents, the short dentsbeing,I provided with c ves to receive one set oi the warp-thremls, saidc 1nl, ined comb and reed being' `given both vertical and lateralmovements under the control oll said pattern mechanism, and a locking`device also under the control ot' said pattern mechanism l`or locking.;`the combined comb and reed at the end of one of its lateral movements,substantially as described.

FREIHCRICl( F. NOU] I IC.

